A thickening of the skin caused by friction or pressure.
The thickened part of the lip.
Protective, scab-like tissue that forms over healed wounds.
Undifferentiated cell mass normally formed by wounding. Can be induced in a laboratory for use in cell culture, somaclonal selection, or plant transformation.
Tissue that forms over cut parts of fronds
Tissue formed by an African Violet or other plant to repair an injury, i.e., at the point where a leaf cutting is taken. It is at the callus where a leaf cutting will begin to form roots.
Undifferentiated plant cells resulting from cell division of differentiated organs, such as leaves, roots, seeds. The undifferentiated callus can be triggered by hormones to develop into a whole plant.
an acquired, localised area of thickening resulting from continued physical trauma.
area of skin that grows thick in response to repeated pressure and friction
a growth of new bone tissue in & around a fractured area, ultimately replaced by mature bone; acquired, localized thickening
Cork-like protective tissue which covers wounds
1. Localized thickening of the skin. 2. A fibrous band formed around the site of a fracture that seals the ends of the bone together and is then gradually replaced by mature bone.
n. (L. callus, callum, hard skin) a hard protuberance or callosity; new tissue covering a wound.
The cluster of cells that results from tissue culturing a single plant cell.
A hard thickening around or on a structure.
Thickened tissue that is formed by the cambium layer to aid the healing around a wound.
Scar tissue that forms when a plant has been damaged or cut. When propagating some succulents it is best to have the leaf form a callus, to prevent disease and rotting.
The composite mass of tissue that forms between bone ends when a fracture is healing. Callus is also the mass of tissue that can develop over pressure areas of the feet in people with diabetes who have ischaemia and/or neuropathy
a raised thickening; in gastropods, pertains to the columellar wall, covering the umbilicus to varying degree.
A swelling which develops around a fractured bone as part of the healing process.
A localized thickening of the epidermis due to chronic mechanical stresses; a thickened area that forms at the site of a bone break as part of the repair process.
Mass of undifferentiated plant cell s, in divisions, with totipotencity, obtained by in vitro culture or naturally after a wound of tissues or an infection. Whole plants can be regenerated from calluses. Calluses can also be at the origin of cellular suspensions.
Parenchyma tissue that grows over a wound or graft andprotects it against drying or other injury.
an undifferentiated cell mass that develops at the edge of a wound, can be induced to differentiate into roots and shoots in culture
an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)
bony tissue formed during the healing of a fractured bone
(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid
a build-up of hard skin, usually on the underside of the foot
a build-up of skin that forms in response to excessive
a hard, thick area of skin
a hard, thick, sometimes painful pad of skin
a mixture of meristematic cells and parenchyma cells
a more diffused thickening of the skin whereas a corn is a thicker and more focused
a more diffuse thickening of the skin (more common on the toes, but can occur under the ball of the foot) whereas a corn is a thicker more focal area area (more common on the toes)
an abnormal thickening of the top layer of skin, which is composed of the natural protein, keratin
an abundance of hardened skin that can safely be filed down with an over-the-counter product that is similar to sand paper
an area of hard, thickened skin that can occur across the ball of the foot, on the heel, or on the outer side of the big toe
an area of new bone that is laid down at the fracture site as part of the healing process
an area of thickened skin that generally develops where there is little or no muscle or fat to separate the skin from the bone
an irregularly structured mass of cells whose rates of differentiation and growth differ
a painless thickening of skin due to repeated pressure or irritation
a patch of compact, dead skin up to an inch wide on the bottoms of the feet, the palms of the hands, or any area subject to friction
a rough, thickened area of skin that appears because of repeated irritation or pressure to an area of skin
a rough, thickened lump of dead skin that is usually painless
a rough, thickened patch of skin
a thickened pad of skin, usually on the weight-bearing portion of the sole, that results from chafing and pressure
a thickening of skin that is exposed to prolonged rubbing
a thickening of the outer surface of skin due to repetitive pressure on a given part of the body
A firm thickening, like the thickened base of the lemma of many grasses (Poaceae).
Parenchymatous cell mass that forms over plant wounds and is commonly seen growing as white, undifferentiated cells from cultured plant cells or tissues.
The raised roll of tissue that forms as a wound heals and closes
a thickened portion of the skin
The healing over of the cambium layer after wounding.
The scab formed during the healing process of a cut surface. It also forms at the end of a cutting before rooting commences.
New bone formed at fracture site
An undifferentiated clone of plant cells.
Woody 'scar' tissue that forms over a wound where a branch has been pruned. It's the trees healing process.
The bony material that bridges fractured bone fragments
A localized firm thickening of the upper layer of skin as a result of repetitive friction. A callus on the skin of the foot has become thick and hard from rubbing (as a result of repetitive friction). Calluses of the feet may lead to other problems such as serious infections. Shoes that fit well can keep calluses from forming on the feet. The hard new bone substance that forms in an area of bone fracture. Bony callus is part of the bone repair process. See the entire definition of Callus
a hard protuberance or swelling.
A thickening of or a hard thickened area on the skin.
A cluster of undifferentiated plant cells that can, in some species, be induced to form a whole plant.
Tissue formed by the cambium layer of tree that covers around a wound.
mass of parenchyma cells, that develops from and around wounded plant tissues. It occurs at the conjunction of a graft union, arising from the living cells of the scion and the rootstock. The production and interlocking of these cells constitute one of the important steps in callus bridge formation between the scion and the rootstock in a successful graft.
A small area of skin, usually on the foot, that has become thick and hard from rubbing or pressure. Calluses may lead to other problems such as serious infection. Shoes that fit well can keep calluses from forming. See also: Foot care.
callos, hard skin] In plants, undifferentiated tissue; a term used in tissue culture, grafting, and wound healing.
The new tissue that grows over a plant wound or cut.
a hardened or thickened part of the skin caused by pressing or rubbing
A thickened area of skin due to consistent pressure or friction, or the area around a bone break where new bone is formed.
Tissue that develops after a plant is wounded and tends to cover the wound. ( BCFT modif).
Tissue that forms over a wound on a branch or trunk as part of the healing process.
A mass of thin-walled, undifferentiated plant cells, developed as the result of wounding or culture on nutrient media. ()
A mass of immature plant cells growing in laboratory tissue culture. Can be stimulated to develop into an entire plant with appropriate treatment with plant hormones.
Scar tissue formed around cut wounds, eventually covering them. Formation of callus is greatly aided by a smoothly finished pruning cut.
is a common, usually painless, thickening of the skin on the feet or hands, at points of external pressure or friction.
New undifferentiated tissue produced at wound margins. Later develops into new wood which grows to cover (occlude) the wound. Forestry Victoria
A part of skin that becomes thick and hard from rubbing or pressure. Tight shoes can cause calluses.
Corky-texture tissue that forms over a wound on a trunk or branch.(e.g.: a pruned branch)
A hard thickening or protuberance.
hard, bony tissue that joins the broken ends of a fracture.
Hard, tough, thickened skin area, usually resulting from prolonged friction.
Parenchyma tissue that grows over a wound or graft and protects it from drying or injury.
An unorganized, proliferative mass of differentiated plant cells; a wound response.
A callus is an excessive build-up of the hard tough skin layers, usually found on feet or areas of the body that endure a lot of friction.
Thickened, hardened area of skin caused by build-up due to friction against the skin.
An excessive build up of the hard tough layers of skin. Can be removed at-home or by an esthetician.
In dermatology, a callus (or callous) is an especially toughened area of skin which has become relatively thick and hard as a response to repeated contact or pressure. In botany, the term is also used to announce a condition of thickened surfaces of leaves or other plant parts. Since repeated contact is required, calluses are most often found on hands or feet.
In biology research a Callus of Cells is a mass of undifferentiated cells.
